Superheating gas-burner.



Patented Feb. l3, I900; J. L. CAMPBELL.

SUPEBHEATING GAS BURNER.

(Application filed Oct. 24, 1899.)

2 Sheets-Sheet (No Model.)

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No. 643,466. Patented Feb. l3, I900. J. L. CAMPBELL.

SUPERHEATING GAS BURNER.

(Application filed Oct. 24, 1899.)

2 Sheets8haet 2,

(No Model.)

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JAMES L. CAMPBELL, OF WEST ELIZABETH, PENNSYLVANIA.

SUPERHEATING GAS-BURNER.

SPECIFICATION forming part of Letters Patent No. 643,466, dated February 13, 1900.

-Application filed October 24, 1899. Serial No. 734,670. (No model.)

To aZZ whom it may concern:

Be it known that I, JAMES L. CAMPBELL, a citizen of the United States, residing at West Elizabeth, in the county of Allegheny and State of Pennsylvania, have invented new and useful Improvements in Superheating Gas- Burners, ofwhich the following is a specification.

My invention relates to gas-burners of the regenerative or superheating type; and one object of the same is to produce a burner which will thoroughly superheat the gas and air before it is ignited in order that perfect combustion may be accomplished and in order that the maximum amount of heat may be obtained from the gas.

Another object is to provide a gas-burner which is practically odorless and in which every combustible particle of the gas is consumed.

Still another object is to produce a superheating gas-burner which shall be simple in construction, efficient in use, and one which may be produced at a small cost.

I attain the objects referred to by means of the construction shown in the accompanying drawings, which form a part of this specification, and in which- Figure 1 is a side view of one form of my improved burner, showing a certain arrangement for use in heating purposes. Fig. 2 is a plan view of the superheating and air and gas mixing chambers. Fig. 3 is a vertical section on the line so a, Fig. 2. Fig. 4: is a plan view of a mixing-chamber of a somewhat-different shape, but involving the same general principle in construction and operation. Fig. 5 is a plan View of the upper part of my invention, showing a deflector-ring and utensil-support which I may use. Fig. 6 is a central vertical section of the burner shown in Figs. 4 and 5.

Like numerals of reference designate like parts wherever they occur in the different views of the drawings.

Referring now to Figs. 1, 2, and 3,.the numeral l designates an open-front portable firegrate of ordinary construction and containing a quantity of asbestos 2. The superheating and mixing chamber is designated by the numeral 3, and the air-mixer is indicated by the numeral 4. The superheating and mixing chamber 3, as shown in said figures, consists of an outer casing or drum 5, preferably of sheet-iron, although not necessarily of such material, as it may be cast, and provided with a bottom flange 5, as shown in Fig. 1. This flange may be omitted,however,and the lower edge of the casing may rest upon a flange formed'on the bottom of the inner casing 13.

The bottom 6 of said casing 13 has a collar 7 projecting downward therefrom,and said bottom 6 and the flange 5" may be held in place by keepers or slides 8,having hooked flanges 9. Two of such keepers are shown placed upon opposite sides of the center of the drum 5. An inlet 10 extends upward through the collar 7 into the superheating-chamber to a sub stantially central horizontal point in said chamber. This inlet-pipe 10 extends upward through the air-mixer at and at its lower end is provided with a suitable connection 11 for the gas-supply pipe. Surrounding the pipe 10 within the drum is an oval casing 12, the upper Wall of which forms a deflector 13 for the incoming jet of gas and air.

The casing 12 is suspended within the mixing-ohamber in any suitable manner, so long as the lower edge of said casing is located slightly above the bottom 6, and the deflector or upper wall 13 is arranged a slight distance above the inner opening of the pipe 10. The arrangement of the casing 12 with relation to the inlet-pipe 10 forms between them a space, which may be properly called the superheating-chamber 12 and as the gas and air enter the pipe 10 they impinge against the inner upper wall13 of the superheatiugchamber and are deflected outward and downward to fill the chamber 12 and when the gas is ignited forations 14 are formed in the extension of the upper wall 13 of the casing 13". The drum 5 incloses said chambers, and is also provided with a series of perforations 15 near its upper edge. An oval ring 16, of asbestos-board or metal, rests upon the top 13 of the combined superheating and mixing chambers. This ring may either be provided with feet, as shown at 17, Fig. 3, or said ring may be provided with a series of perforations or apertures to serve the same purpose, and said ring is smaller than the drum 5 and rests on said drum inside the series of perforations 14.

I may use an air-mixer of ordinary or any suitable construction, and the one shown is provided with an inlet-pipe 18, having at its outer end a slide-door 19 to regulate the quantity of air to be admitted and depending upon the amount of gas used, the bottom of said inlet-pipe 1O terminating at a suitable distance above the bottom of the mixer 4. A valve of anysuitable construction may be provided for attachment at 11 to regulate the flow of gas.

The construction thus far describedhas special relation to heating and illuminating purposes, and the operation thereof is as follows: The gas and air mixed enters the superheating-chamber 12 through the pipe 10, and as the jet is forced against the deflector 13 it takes a downward course within the casing 12 until it reaches the bottom edge thereof, where it is permitted to again ascend between the casing and drum. \Vhen this jet of gas and air escapes through perforations 14, it is ignited above the burner, and the superheating-chamber is heated almost instantly, and thus the gas and air are continuously superheated. The asbestos ring 16 and the asbestos 2 take on an incandescent glow and furnish a bright and intense heat and light.

The burner thus far described is of an oval or oblong contour; but any shape desired may be given to the device, depending upon the use for which the burner is intended.

The burner shown in Figs. 4, 5, and 6 is circular or round, and for cooking purposes this is a desirable shape, which needs but slight change in structure from that hereinbefore described. The outer drum 5 is detachable and rests upon the flanged connection 9 which attaches the bottom 6 to the inner casing 12. This bottom 6 is provided with an opening or collar 10 for the inlet-pipe, the latter adapted to extend up to near the upper wall of the casing 13, which serves as a deflector and directs the gas downward under the lower edge of the casing 14. The upper wall of the casing 12 is provided with two rows of perforations 16. Resting on top of this casing is a metal ring 17, having a flaring lower edge 18 and a series of perforations 10 just above the lower edge. An asbestos ring 2O" rests upon the casing 14 within the collar 17 and between the two rows of perforations 16. It will be noticed that the rings 16 or 20 are located out of direct alinement with the perforations 14 or 16, and the purpose of this arrangement is to give a free draft and to permit the burning jet of gas and air to impinge on the ring to radiate the heat. A fiat metal ring 21, having a central aperture 22, rests upon brackets 23, having their bent upper ends engaged with the upper edge of the ring 17. This device may be used to form a support fora cooking utensil and to retard or radiate the heat, and it can be removed at will if not required or under certain conditions. The space 24 between the drum 5 and the casing 12 forms a hot-air compartment to supply hot air to the flame.

It will be noticed that the wall or top 13 or 13 of the combined superheating and mixin g chambers is formed of a single thickness of metal and is provided with one or more rows of perforations let or 10 outside the superheating-chamber and at the top of the mixing-chamber. While I have shown the wall 13 as of a single thickness and regard this as an important feature in a burner of this type, practically the same result may be attained in several ways. For instance, the casing 12, which is shown as riveted to the wall 13, may be made with an imperforate top and may be extended through the top of the casing 13', or other methods may be re sorted to; butI do not wish to be understood as limiting myself in this particular.

Having thus fully described my invention, what I claim is 1. In a superheating gas-burner, combined superheating and gas and air mixing chambers, formed by a casing having a supplemental inner wall forming the superheating chamber, said wall forming a partition between the superheating and mixing chambers, and closed at the top and open at the bottom, the casing having an imperforate top for the superheating-chamber and perforations in the top of the mixing-chamber and an asbestos and a metal ring resting on top of said mixing-chamber, out of alinement with the perforations, substantially as described.

2. In a superheating gas-burner, the superheating and mixing chambers having an upper wall provided with an imperforate portion forming a top for the superheating-chamber and a perforated portion forming a top for the mixing-chamber, and an asbestos ring resting on top of said mixing-chamber, out of alinement with the perforations substantially as described.

3. In a superheating gas-burner, the combination of the superheating and mixing chambers having an upper wall provided with an imperforate portion forming a top for the superheating-chamber and a perforated portion forming a top for the mixing-chamber, and an asbestos and a metal ring resting on top of the mixing-chamber between two rows of perforations, substantially as described.

4.. In a superheating gas-burner, the combination of the superheating and mixing chambers having an upper wall provided with an imperforate portion forming a top for the superheating-chamber and a perforated portion forming a top for the mixing-chamber, my hand in presence of two subscribing Witan asbestos ring resting on top of said mixnesses. ing-ohamber out of line with the perforations, and a flat radiator-ring and support for cook- 5 ing utensils resting upon brackets, substan- W'itnesses:

tially as described. BENNETT S. JONES,

In testimony whereof I have hereunto set FRANK G. RADELFINGER.

JAMES L. CAMPBELL. 

